Nakamura Stainless, based in Pulau Ujong, Singapore, is a trusted manufacturer and supplier of high-performance stainless steel components, including stainless steel 348H flanges. These flanges are designed for high-temperature and high-pressure environments, offering strong resistance to intergranular corrosion and thermal fatigue. Stainless steel 348H is a niobium-stabilized austenitic alloy with a higher carbon content, which provides durability and strength in extreme conditions. Nakamura Stainless follows strict quality control and effective manufacturing processes, making their 348H flanges perfect for petrochemical plants, power generation systems, and heat-intensive industrial applications.
Stainless steel 348H flanges are made from an austenitic stainless steel alloy that contains about 17-19% chromium, 9-13% nickel, and niobium (columbium) for stabilization. The higher carbon content in the “H” grade improves high-temperature strength and creep resistance. These flanges have a tensile strength of about 550-750 megapascals and maintain their structural integrity at temperatures above 800°C. The presence of niobium prevents carbide precipitation during welding or thermal exposure, ensuring strong resistance to intergranular corrosion and making them suitable for long-term use in high-temperature environments.
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| SS 348H | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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SS 348H blind flanges are designed to seal the end of pipes, providing a strong, corrosion-resistant barrier in high-temperature applications. They ensure system integrity and are ideal for maintenance and pressure containment.
SS 348H ring-type joint flanges offer superior sealing in high-pressure and high-temperature applications. Their precision-engineered design ensures leak-proof connections, making them ideal for demanding environments in industries like petrochemical and aerospace.
SS 348H forged flanges provide exceptional strength and durability, ideal for high-temperature and corrosive environments. Their forged construction ensures high structural integrity and reliability in critical industrial applications and piping systems.
We carry out robust quality tests on stainless steel 348H flanges to provide superior performance and reliability. The products undergo extensive inspection in-house. We facilitate third-party to facilitate when they are needed. Our focus is always on timely delivery to ensure our clients receive their orders without compromising quality or performance.
Stainless steel 348H flanges are widely used in industries that require high-temperature and corrosion-resistant components. Common applications include heat exchangers, pressure vessels, boiler systems, and piping in chemical processing and power generation plants. These flanges are ideal for welded structures that operate at high temperatures, where it’s important to maintain mechanical strength and corrosion resistance. Their ability to handle thermal cycling and high stress makes them a reliable choice for connecting pipes, valves, and other equipment in critical systems exposed to tough operating conditions.
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